x86/paravirt/xen: add set_fixmap pv_mmu_ops

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 74f0c5ea2a0388af848faa058804cd9df86f4391..cf06670349dcfe04fe19233eab5febc28cb64fa4 100644 (file)
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -416,6 +416,8 @@ struct pv_mmu_ops pv_mmu_ops = {
                .enter = paravirt_nop,
                .leave = paravirt_nop,
        },
+
+       .set_fixmap = native_set_fixmap,
 };
 
 EXPORT_SYMBOL_GPL(pv_time_ops);

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 7498124e30fca22963ca8374fb477041b05f75f8..e9fb66361fc8882976ebe1db0c2a098b0a0f931f 100644 (file)
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -277,7 +277,7 @@ int ptep_clear_flush_young(struct vm_area_struct *vma,
 
 int fixmaps_set;
 
-void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
+void __native_set_fixmap(enum fixed_addresses idx, pte_t pte)
 {
        unsigned long address = __fix_to_virt(idx);
 
@@ -285,6 +285,11 @@ void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
                BUG();
                return;
        }
-       set_pte_vaddr(address, pfn_pte(phys >> PAGE_SHIFT, flags));
+       set_pte_vaddr(address, pte);
        fixmaps_set++;
 }
+
+void native_set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
+{
+       __native_set_fixmap(idx, pfn_pte(phys >> PAGE_SHIFT, flags));
+}

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c8a56e457d61a35c21040bbe91486f9ceb9bf6bf..0ad8a64a2e058879b623ad709dc3feadce22b4a5 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -960,6 +960,33 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
        return ret;
 }
 
+static void xen_set_fixmap(unsigned idx, unsigned long phys, pgprot_t prot)
+{
+       pte_t pte;
+
+       phys >>= PAGE_SHIFT;
+
+       switch (idx) {
+       case FIX_BTMAP_END ... FIX_BTMAP_BEGIN:
+#ifdef CONFIG_X86_F00F_BUG
+       case FIX_F00F_IDT:
+#endif
+       case FIX_WP_TEST:
+       case FIX_VDSO:
+#ifdef CONFIG_X86_LOCAL_APIC
+       case FIX_APIC_BASE:     /* maps dummy local APIC */
+#endif
+               pte = pfn_pte(phys, prot);
+               break;
+
+       default:
+               pte = mfn_pte(phys, prot);
+               break;
+       }
+
+       __native_set_fixmap(idx, pte);
+}
+
 static const struct pv_info xen_info __initdata = {
        .paravirt_enabled = 1,
        .shared_kernel_pmd = 0,
@@ -1112,6 +1139,8 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = {
                .enter = paravirt_enter_lazy_mmu,
                .leave = xen_leave_lazy,
        },
+
+       .set_fixmap = xen_set_fixmap,
 };
 
 #ifdef CONFIG_SMP

diff --git a/include/asm-x86/fixmap.h b/include/asm-x86/fixmap.h
index 934d6b49b530e74c4514bfe650e34c3a4eee5d53..44d4f82173496d2984b9c6612c4d4fe48341a146 100644 (file)
--- a/include/asm-x86/fixmap.h
+++ b/include/asm-x86/fixmap.h
@@ -9,8 +9,18 @@
 
 extern int fixmaps_set;
 
-extern void __set_fixmap(enum fixed_addresses idx,
-                        unsigned long phys, pgprot_t flags);
+void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);
+void native_set_fixmap(enum fixed_addresses idx,
+                      unsigned long phys, pgprot_t flags);
+
+#ifndef CONFIG_PARAVIRT
+static inline void __set_fixmap(enum fixed_addresses idx,
+                               unsigned long phys, pgprot_t flags)
+{
+       native_set_fixmap(idx, phys, flags);
+}
+#endif
+
 #define set_fixmap(idx, phys)                          \
        __set_fixmap(idx, phys, PAGE_KERNEL)
 

diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0f13b945e2400323cb65dfd6f8a7cc5b035c3319..af85caf9a7996e05fd3ee4c4c2fc5696443b14e1 100644 (file)
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -273,6 +273,13 @@ struct pv_mmu_ops {
 #endif
 
        struct pv_lazy_ops lazy_mode;
+
+       /* dom0 ops */
+
+       /* Sometimes the physical address is a pfn, and sometimes its
+          an mfn.  We can tell which is which from the index. */
+       void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
+                          unsigned long phys, pgprot_t flags);
 };
 
 /* This contains all the paravirt structures: we get a convenient
@@ -1252,6 +1259,12 @@ static inline void arch_flush_lazy_mmu_mode(void)
        }
 }
 
+static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
+                               unsigned long phys, pgprot_t flags)
+{
+       pv_mmu_ops.set_fixmap(idx, phys, flags);
+}
+
 void _paravirt_nop(void);
 #define paravirt_nop   ((void *)_paravirt_nop)